清华大学：《数据中心网络 Data Center Networking》课程教学资源（PPT课件讲稿）

Data Center Networking Dan li CS Department, Tsinghua University 2021/2/8

Data Center Networking 2021/2/8 1 Dan LI CS Department, Tsinghua University

Outline Data center Introduction Data center network architectures Fat-Tree Vl2 dcell BCube FiOnn 2021/2/8

Outline  Data Center Introduction  Data Center Network Architectures  Fat-Tree  VL2  DCell  BCube  FiConn 2021/2/8 2

Data centers 她上 Collaboration Empowered User SLA Metrics Global Availability Reg compliance Cloud Computing Data Centers Power Cooling Asset Utilization Provisioning Security Threats Bus Continuance 害

Data Centers 2021/2/8 3 Data Centers Cloud Computing Collaboration Empowered User SLA Metrics Global Availability Reg. Compliance Power & Cooling Asset Utilization Provisioning Security Threats Bus. Continuance

History of Data Centers Data centers have their roots in the huge computer rooms of the early ages of the computing industry In 1980s. companies grew aware of the need to control it resources Data centers started to gain popular recognition in 1990s 2021/2/8 4

History of Data Centers  Data centers have their roots in the huge computer rooms of the early ages of the computing industry.  In 1980s, companies grew aware of the need to control IT resources.  Data centers started to gain popular recognition in 1990s. 2021/2/8 4

History of Data Centers(Cont) The boom of data centers came during the dot- com bubble Since then, many companies started building very large facilities, called Internet data centers (IDCs), which provide businesses with a range of solutions for systems deployment and operation As of 2007, data center design, construction and operation is a well-known discipline 2021/2/8

History of Data Centers (Cont.)  The boom of data centers came during the dot￾com bubble.  Since then, many companies started building very large facilities, called Internet data centers (IDCs), which provide businesses with a range of solutions for systems deployment and operation.  As of 2007, data center design, construction, and operation is a well-known discipline. 2021/2/8 5

Requirements for modern data centers a data center must keep high standards for assuring the integrity and functionality of its hosted computer environment Effective data center operation requires a balanced investment in both the facility and the housed equipment Information security is also a concern and for this reason a data center has to offer a secure environment 2021/2/8

Requirements for modern data centers  A data center must keep high standards for assuring the integrity and functionality of its hosted computer environment.  Effective data center operation requires a balanced investment in both the facility and the housed equipment.  Information security is also a concern, and for this reason a data center has to offer a secure environment 2021/2/8 6

Data center classification Tier Level Requirements Single non-redundant distribution path serving the IT equipment 1 Non-redundant capacity components Basic site infrastructure guaranteeing 99.671% availability Fulfils all Tier 1 requirements Redundant site infrastructure capacity components guaranteeing 99.741% availability Fulfils all Tier 1 Tier 2 requirements Multiple independent distribution paths serving the IT equipment 3 .All IT equipment must be dual-powered and fully compatible with the topology of a site's architecture Concurrently maintainable site infrastructure guaranteeing 99.982% availability .Fulfils all Tier 1, Tier 2 and Tier 3 requirements All cooling equipment is independently dual-powered, including chillers and Heating, Ventilating and Air Conditioning(HVAC) systems Fault tolerant site infrastructure with electrical power storage and distribution facilities guaranteeing 99.995% availability 2021/2/8

Data center classification Tier Level Requirements 1 •Single non-redundant distribution path serving the IT equipment •Non-redundant capacity components •Basic site infrastructure guaranteeing 99.671% availability 2 •Fulfils all Tier 1 requirements •Redundant site infrastructure capacity components guaranteeing 99.741% availability 3 •Fulfils all Tier 1 & Tier 2 requirements •Multiple independent distribution paths serving the IT equipment •All IT equipment must be dual-powered and fully compatible with the topology of a site's architecture •Concurrently maintainable site infrastructure guaranteeing 99.982% availability 4 •Fulfils all Tier 1, Tier 2 and Tier 3 requirements •All cooling equipment is independently dual-powered, including chillers and Heating, Ventilating and Air Conditioning (HVAC) systems •Fault tolerant site infrastructure with electrical power storage and distribution facilities guaranteeing 99.995% availability 2021/2/8 7

Physical layout e a data center can occupy one room of a building, one or more floors or an entire building 2021/2/8

Physical layout  A data center can occupy one room of a building, one or more floors, or an entire building. 2021/2/8 8

Physical layout(Cont The physical environment of a data center is gorously controlled Air conditioning is used to control the temperature and humidity in the data center Modern data centers try to use economizer cooling, where they use outside air to keep the data center cool 2021/2/8

Physical layout (Cont.)  The physical environment of a data center is rigorously controlled  Air conditioning is used to control the temperature and humidity in the data center.  Modern data centers try to use economizer cooling, where they use outside air to keep the data center cool. 2021/2/8 9

Physical layout(Cont Backup power consists of one or more uninterruptible power supplies diesel generators of the electrical systems, are typical/y futr cnts To prevent single points of failure, all elem duplicated Data centers typically have raised flooring made up of 60 cm(2 ft) removable square tiles 2021/2/8

Physical layout (Cont.)  Backup power consists of one or more uninterruptible power supplies diesel generators .  To prevent single points of failure, all elements of the electrical systems, are typically fully duplicated.  Data centers typically have raised flooring made up of 60 cm (2 ft) removable square tiles. 2021/2/8 10